According to the Bible, giants roamed the planet in ancient times. But where's the proof? Brothers Bill and Jim Vieira head into secret chambers, tunnels and mysterious burial mounds for evidence that a race of giants once existed, since none of the previously reported skeletons can be found in museums. The two hope that any discoveries they make could reveal new information about a secret chapter in history. It could take merely one bone or strand of DNA to get to the bottom of the puzzle.